date to start prometrium

Hi Ladies,
I was on prometrium for last 3 months trying to get pregnant and was put on clomid 50mg for ovulation.since i cudnot see any lines on ovulation stickes(i think i am not ovulating) I have PCOS ,so was monitoring my follicles to a bigger size so that i can take hsg shot to ovulate. but my follicles didnot grow to the concerned size. and i need to increase my dose for clomid 100mg. i still donot know when i have ovulated. they did my blood work to check that. but not yet told the results and i missed the dates for prometrium. i generally take at 16 or 17th day and get my period 1st 0r 2nd day of a month(10days prometrium and 12th day i get period) but this month i missed the dates and now its 2nd of the month -still NO Period. My question is when can i start prometrium for this month. please give me all the best suggestions and also if anyone taking same medicines please do reply. i am so stressed out and i missed this month period. I am trying hard to have kids and now i am 34yrs old ,all my frriends hav kids and by my age they are all with 2-3kids. I hope my medicines work soon.
Thanks.